MAX847
1 Cell, Step-Up Two-Way Pager System IC
Complete Power Supply and Monitoring System with SPI™ Interface Simplifies Design, Saves Cost and Space
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Overview
Features and Benefits
- 80mA Output from 1 Cell at 90% Efficiency
- 13µA Idle Mode™ (coast) Current
- Selectable Low-Noise PWM or Low-Current Operation
- PWM Operating Frequency Synchronized to Seven Times an External Clock Source
- Operates at 270kHz with No External Clock
- Automatic Backup-Battery Switchover
Product Details
The MAX847 is a complete power-supply and monitoring system for two-way pagers or other low-power digital communications devices. It requires few external components. Included on-chip are:
- A 1-cell input, 80mA output, synchronous-rectified boost DC-DC regulator with a digitally controlled +1.8V to +4.9V output
- Three low-noise linear-regulator outputs
- Three DAC-controlled comparators for software- driven 3-channel A/D conversion
- SPI™-compatible serial interface
- Reset and low-battery (LBO) warning outputs
- Charger for NiCd, NiMH, lithium battery, or storage capacitor for RF PA power or system backup
- Two 1.8Ω (typical) serial-controlled open-drain MOSFET switches
An evaluation kit for the MAX847 (MAX847EVKIT) is available to aid in design and prototyping.
Applications
- 1-Cell Powered Handheld Equipment
- GPS Receivers
- Two-Way Paging
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
Product Recommendations
MAX847 Companion Parts
Recommended Related Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX847EEI+ | Material Declaration | Reliability Data | 28-QSOP-150_MIL | |
| Wafer Fabrication Data |
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Buy Now Pricing
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List Pricing
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